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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf136f58bba4caec693a78a2fc175312ec2852f4a091944b98e837faa2736c18' 
  AND token = 'yfCvddxR2xO/7AkGY+Z1eeRuSp05Kk3XsD8sj4aP0bA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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