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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fbddea7b5b35747a6b2bbe05fc814c887112686174c7d5e65a4b2698db6e9644' 
  AND token = 'dJKnB5GYIsLHcsEl2xfoicd9H6oJAoaM5macLcttOTw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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