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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c69401e76d1d2a6af43349da054fa04d47b4aff69693f2acf4693debbc8183aa' 
  AND token = 'oN1Lav5g6Eu+o759+xJyQVPWWFnfB46+u2RjETg82B0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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