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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '880e23558408c83f3ff2949aaac38c1c8b2099fa3ff7141cdc20f89725501462' 
  AND token = 'gAesJo5jg3eBb5eutPtBoiLinSmESB9a5Vri0x869bU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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