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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '082ff565b47e3d65362ecc9aa59396a90793d178822cdf3c1e3ba22d222d7d5e' 
  AND token = 'O7kw9fp0tIvA+n8gG4mpcxnyuEpDs7WZS1GG6tUbYww=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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