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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '985a1fe775fd287c4ce93cfc8d8cb47e288e2adf6af4875bd9d520dd9064a6d5' 
  AND token = 'XsTxye4xtTnm7s+KkQ7rTVnatiG3IrPi27l1TdWi2Uk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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