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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2283aff45eded0a30bd51e1b53b28ca532b4880f52ae17b16ea995415bc3f7f' 
  AND token = 'pGO8vO5Z4TPfg/TRmeHuqhuNXbWT/He7/h7ozSjsCu0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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