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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22b8ba829873de72c1c188524af6165f42f74ce7ac690daf5690d3d40de27792' 
  AND token = 'pXUO1SJ3JYH/5nocx1XJvuMS8T2V6EzhfJS73XLkGSM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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