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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4a226d3446f1a5be4dc9c2a7fbd847ba2deb21bb3f43f3e3377f3cd8c1eaf0db' 
  AND token = '73Z9gUYfMn9hlCymKDRmHhbggUl2OWB9v+TTufkrNt4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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