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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e3d2592d9b5f243c4d3ccf21841ac63b95bd817705cf5091fb904e01e7d86455' 
  AND token = 'iFnRjrtrumeo+6ZRT0K0btSTz1lPD2k/EfmbYisWwHk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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