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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8c92d72e7ccdb825f4d4c2b05d712b169848d8a1cbf9ed40206563f4fa5d4418' 
  AND token = 'GaGFa/WgkaB7C0ncPNg1pAd9EJQbLgt9g1BDS7TcQZ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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