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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98061157c57d8694e24934846a81297aa382640aa871beb4785aa3d3a6080e9f' 
  AND token = 'XPyhyUnGlJ3B2hXjlY/PkLo12pCLpd/uxb1NPsF0u1Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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