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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed1abe8e91f2a3f427fcf6b1c4eb706087d83cadcf602c9e50e32bbd63291fb6' 
  AND token = 'h06IixMKPSx137RGJ90FGBsrD73HpKmnRsD8ujaJ07k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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