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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c8e0a9ef35529f541b25a6785701c5718f8a3a1c6fa37117108d3d3eab01308' 
  AND token = '9bIA4sO5AMBBRz2G6Hs7x5/gvAKAiRfMfJCBQP0o8nU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}