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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bba6c64eea218e9048ba5cce59ec2cc2cf08d1062c08cce63f7fb5e0bac12835' 
  AND token = 'VlzG3xhFwYMnVasW1a9yjH7/YtPl72BJPVcGD+X0LyM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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