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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa0832b001e7a9dd17db02016d8e5ff67adf83573e68c1d0e0defa4601c1b2d1' 
  AND token = 'aBh1gMjuxaLr+k/1i7XXFXvWvjz1NfNooJdJMUScbUk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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