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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ee28608f73de8e20bc6f4d8ae454d826df7b83dba63fa0f71b867d27d6cf7c2' 
  AND token = 'v38G6ElNVny9iltNMLKZnO3ru3sZbvZLheYrGdopbDo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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