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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2933ca65f66fadaa06924bff6c16b4b9cf967f933dd9a89e7af00e0e1ece0fcc' 
  AND token = 'L7xm/uL2MSv2Kko8q7SWXYM0e+gP/L25skH5sV2/IFs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}