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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5466a15d14096a6a9714d5fa0b2c0917d89ffae72f2d7ed46f89c022586d2f8' 
  AND token = 'CWO/BhLoSIw23WyNLNrl/w5qfYu3In40pr21rdhK89g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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