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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2acde13410cd694eedf56d5c1d5e159a2e09ca6cd8a92f5d7670ec6da9d6834e' 
  AND token = 'EuzGqKLuiOB7BQwdt9TX5i7Lv4g0TQ70H5a6kUVbR7c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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