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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab95e7bb1d5fc2be28fc1aa0689964f5dd13b1653f2e4140e0bc04e25e582e97' 
  AND token = 'KqcQxzvkZQ1ohGQ74f7Ek9sW8X12FqH0O1mxo/PrfVY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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