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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c63bd946f8bd577af8f19370b9d7d86b7f7ffde28378ad8fa565a6520f1054fd' 
  AND token = 'NP7onQB/8Nf5HcidkDYKZDWZa38V3Ldw/ATvTHDts30=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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