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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '707505edbc6593f4d040c1deb77f821698d3a46d05c7a06adcffdae37b260101' 
  AND token = 'Sy11yj2S+OzWIrDBU8SuDdOGwqxH1azMPRyBbg4mTcc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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