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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '469765343aa5346bcd0419888fd1602c68282568fa4123d683708629f248ef43' 
  AND token = 'yR4h8dwHTBBfx4UY3Zg0ahKSp99wUvXq3x1OzANTsSU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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