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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32aaf34cc6cefca03159d04dab74d57fbd0ce8fabf3992e84f6dd219bd0b7263' 
  AND token = 'OdLyeLViXRHtGy0Y20A7Z72fhbhaZXPrcsZBI9iNCFc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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