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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7130f0465a1bf7e40ea2197af794772287613a56194ece31770aff085fd5fc4c' 
  AND token = 'YRRbW13IY79BUl123jAXuslnNxvBqQhr+4+XBX5BBdA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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