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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '79945ae8c6f42b3946f42e7bdb0b76d4ec9e20cf67ee5b28117ceda5c0df3038' 
  AND token = 'Ynrrzoi1e6usmG5Fqso95wR7apdCXFfUtxAS2g4ebtM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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