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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '765a81849ff04dc4e62c296269518b59276122c9f6321717a938853bad2af5f8' 
  AND token = 'LzfwDOfoyA4Fg5K0PywQbxuFsQ/bj0qmjn6rEkQxXas=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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