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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1969433f3a80f4cf5cd963af6baac727f478c72dcba22980409cc3e49dc6329b' 
  AND token = '5eVvQ27i0vVlOg1CryhO9+oFkz3EvKyvjYpAU4jO3Ho=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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