SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6e44ed5871baf51b8b02c1c68d3808bc8f099a1dfa181ddf564593db9ffede1f' 
  AND token = 'bHi2t+agxZbKKXNkwPBRh5ZPm59ezzxmz02KA1sCg80=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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