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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09a32133b326363cc7e4ac475803397eb1d1e311f23966dc0a632fb9ae3084ef' 
  AND token = 'IjyVY3oXp1knM9as37lDOrV4x/YyjN5OE1V2AoRo0vk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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