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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5430b569a313e8abcf9bd8886fe248a722d92cd4a58ded1cfcd484431e68b3d2' 
  AND token = 'vkDR2R1gisz22N0wHJCm2f3yLrq8j7VdGegVoF6Zpns=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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