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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd067e78625ed8a619fe996878b138d4188cd5994a2e89cbdc31b5b06eb94528a' 
  AND token = 'cBGyBrREH7NaCepcYY3Y0ZSZJ9bcx6ga7NK+PWA6/aE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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