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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cbf7f0c47224f8df8f00bc0d85221a537a738309db7d4c8b0d895eabc7a02f22' 
  AND token = 'oi770fSV+rT08aDWDu3so0yGsD3fwrItsnzI2C01b9M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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