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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd9a31b9598295a1b68b7bc1661ee36eac319e6104eb0d48f37e5151ab8a955ae' 
  AND token = 'IPb31CUz+3Lhsh+rzfwtxojP1b11FCr5rneZjjl5ZEw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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