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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '62e9f87aed08d655f3ba8af32e9b53cde8399cf6f003636ef71827d58abd80db' 
  AND token = 'WJioVmw52O2LP0EIuJBH7mr/b5OO0P2rCEkmVGxO3f4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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