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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '26acde1f8eb3003bba7c625a64d7b9502fb433483ce6e0f705a7c3f3d6630179' 
  AND token = 'z21soTJbg65Q0MX7uaIjXjSLw6eiLC1hJnMqBu4keZc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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