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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63771876c50f168beefeadfcffce32f45c6b3ae87b8400b5913d3a3322b4e8e3' 
  AND token = 'ghkPqRAGQysW+1bnL0ws5nNL/ll/Mj++kNXTJOmqabo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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