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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '07ada58a7be9d9568dcd4952e872270090aecc7f9dd94ae2d95e3d2135563fef' 
  AND token = 'FJdEElQLb0HW9tQb+5PIm+b03Q9CVMgo0DMlcbxuwNY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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