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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1445972e9e791318c974a73c1e1224ee78fa6b025b7fe48b03c0f814f247813' 
  AND token = 'T8p2lr9SW4PoxKJkKQZgFSnm/xEO0uVqY80/LOEMtuA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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