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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a1d41e706c12d6575333e4b0710c1133154e69c7be07a858cc212212d8287d6' 
  AND token = 'lYI0zqqc6Ma5yy/qAgTAt/dRy/DXzXIZLCVy67sP+GM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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