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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb069b7c69bdd1d4e053ad16c3a6ce6da09fb994cbc0c2546f85b3f09ca6231c' 
  AND token = '1jgug7sG+RExYSNxOSueH9DFTlx57rTFC/o8Eqb725Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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