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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7359f2c7a2dfb9b5a0f55324823be01bbdb6e9342a44ef4ec5479b954becd39' 
  AND token = 'wENjqaRiZ7wQbLHHFxQaQR6/kkR4g365ORdW9Z+s19A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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