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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ba6195eb2e5b2643dab6cbc9725eb9d28e2b74f9e7e74a9f3af3e090ee417580' 
  AND token = '2NLkgQY/zJ8cnR5n3HTQFwR1UH00J3QaZV3pm3E9h/w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

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