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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f2a30114efaa19d9ebe6e5a02b4505ec0d845e624e087095a91561bb34d2600' 
  AND token = '2jkaEw9UjDh93e9IJigqoupz0yyu7jz7BvOQ6tFBcrs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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