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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0150c003aadfe46d4f164a52bd5baa0cb079c1100cb5afa877f499211742877f' 
  AND token = 'DKC4Ngr+Aw9D7CcXQB63zCsYrd9maI3hiWkgbuqoqSQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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