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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe45d7f39c742a9f789be1f4065faf76a9f4acb8ef0f574a8a63973f27499497' 
  AND token = 'fA7g4Hu1F1Dh7H7uhvEazGbHRz/okzZvBph55pAZ6Zk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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