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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '467d2d9951987215967bb9ddd5e31a8e2ce5d651510fc9aba7dd7092ebde177e' 
  AND token = '+iO/2WEMdcSLBmNCEOvFoc3QPwvUoacs1ws7bdNyelU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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