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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02b2a3c5cce4896136e10ac0c390e7705533f27618e1b04ef5144bd912b8c915' 
  AND token = 'n0Acn9u54vsJNujMSS0jgVE+ZlL/e25gOY5Klzbq8vY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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