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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '622788ca32a3ab6d4f8510ddd1e5f2142b896fea0be385d00d27cd9e2abdcdf2' 
  AND token = 'opQORKqRxwj0m0Z8yLlHxutYG9J86HVGgE48oiHKW+E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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