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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2cca14bf115fe06c2d671a8f4220d275c713abe3f4706eb2b83ea89ca1dc3005' 
  AND token = 'atIAM/Avd6pr/BU3oO+28b36X3ZjLDAopyyp7xiVq0U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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