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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '43705dd5ad31f6cbea94c03fd2095030ee47d6c1ce3d150fb781ae784d73d5f9' 
  AND token = '+AYwKVIQcTHjTwxdtVsdjsAF2Vd9GLEiYJEckXTYijU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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