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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ac998e8dd9613b47b658989caac523168be7baa623fdb80aabdf74c0fd61066' 
  AND token = 'xBmOfTdSah4zGnRn+QJu6/OAOk6Uk70Jh5Q11rG+nSk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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