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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e4a702dbf15a3fd29ab6ddba38410e41a39e664da4ba13f0c611bf80f9c665ff' 
  AND token = '5vRLwCHVkjaAMEPNGvPK4M5jqL/t17NXB4+bf37luD4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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