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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '132a8fd1b01df2f55010a5ae05a7c1f3764468cd4c4f5dcb4ef15bcedb7d7fb7' 
  AND token = '2PBdKKRqDkMXefSLj4aM0t6U3wt496AaI63qqJz1SrU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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