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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c9246612e7277dbfb15154317d1ce4a26239a667b7f8cc829f372d36e489cbc1' 
  AND token = 'YlesT64A/vHCpVa7du6KjN5kdpmLnDenYfv+9yqeytk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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