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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '00620c03487dd6f6418a52bbb0e49e966cd695943168626d108081748f1e7dcb' 
  AND token = '+Y44g186RK3mCsm1K12OJ3iHrx3r8HxbIpqwjoG5kWI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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