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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '071bd9ff8f2bd865695f43659110b5198a395f845850129b9b22093939452117' 
  AND token = 'pANh8LqMoX/Dw/EEYpP4HNNbeJ5YwKRNmJfms3P26VU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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