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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0a8b119b830ff6df94f849ba91a06f09b79a9f6b97f60f480fd524684f08664' 
  AND token = 'B4EnANVGUh2KR4/7TkxQFK9Mb9sKcG/vv4wB4EphQPg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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