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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb5ca417d0ecd89a6165df22337a2114bbd58d9548d857454d3fc3963675eff8' 
  AND token = '71QpEH2unQ3HgE2pULp1mAkxpvTxPFgbTpZtEqfAEqo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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