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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01ad1d1e0a6a79a471173cc77301647d5ff201cfba859c1d745dbb664376e80e' 
  AND token = 'Wa4S1P+D5r5WW2aQlm7GrKNhLyR6q/W63d0guNxrp0c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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