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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2da8f3e6289b541bf77d1ef62da5b29cf06fdb17bb6be66adfedd417cb07b009' 
  AND token = '088k1sCDgY8dsHtYwLBWjqU0qfP+MRfpmFx4f0qw0as=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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