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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '82e036c06a423a9a65ed4fd623745817c6d2bfc04fa74560a6317f106724c11a' 
  AND token = '4FoyfaZGeyUM2b+oCrq+/Df/qN8dUZsa7dP0lAN+fXA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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