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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e146aa9ebd1bd2e00173978756d43a8f46d45bb026e8733c89a2bb4e395682ff' 
  AND token = '25cAxmXk5ElyLd0G+FIg0it07TA/AfQPQ/5zdtWHvq4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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