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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e6fa8b0ec88df2eef75c5afbc581e6ce309afc06280a47aba16c34003e93676' 
  AND token = 'bJFWcQ5PbhBiK6VxOePLKLBQdteAja2YzqzS9TcuJTA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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