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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd6ce8866bf0c77f906cdf702679d18b46f0e1c16aa1c0595f43555c96755d2d3' 
  AND token = 'n5PzfH9fCOK8DC98jNGojrAaveRfP1Sp8bLGhxp+ADA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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